why thunderbird can not connect my email on vps?

February 21, 20151.7k views

I want to build a simple email server on vps with no any ssl certification.
AFTER master the simple email server , I want to build a email server on vps with ssl certification.Here is the way to do it:
apt-get install postfix dovecot-imapd dovecot-pop3d

My domain is noxp.info , email account is joe@noxp.info , passwd for the email is "itisatest" , you can ssh the account and test to send and receive emails, it is ok.